Inventive subject matter disclosed herein includes a method for treating a chronic wound, and methods for treating bacterial infections. The method for treating a chronic wound includes mechanically debriding a chronic wound, and applying a formulation to the wound for 5 to 60 seconds, the formulation including: phenolsulfonic acid—37% by weight guaiacolsulfonic acid—24% by weight free sulfuric acid—29% by weight and water—10% by weight.
